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Chemical reactions in which, a single substance splits up into two or more simpler substances are called decomposition reactions. These reactions are carried out by energy, supplied by different sources. The required energy can be supplied by heat (thermolysis), electricity (electrolysis), or light (photolysis). Let’s talk about photolysis reactions (not photosynthesis): Photolysis (also called photodissociation and photodecomposition) is a chemical reaction, in which a chemical (an inorganic or an organic) is broken down by photons and is the interaction of one or more photons with one target molecule. The photolysis reaction is not limited to the effects of visible light, but any photon with sufficient energy (higher than the dissociation energy of the targeted bond) can cause the chemical transformation of the said (inorganic or organic) bond(s) of a chemical. Since the energy of a photon is inversely proportional to the wavelength, electromagnetic waves with the energy of visible light or higher, such as ultraviolet light, X-rays, and γ -rays, can also initiate photolysis reactions. Like all other peroxides, hydrogen peroxide (H2O2) also consists of a relatively weaker O−O bond, which is susceptible to light or heat. The net equation for the reaction is: 2H2O2⟶2H2O+O2 The step-wise reaction mechanism is suggested as follows (Ref.1): H2O2+hν⟶2HO∙ HO∙+H2O2⟶HO−O∙+H2O HO−O∙+H2O2⟶2HO∙+H2O+O2 Using isotope studies it was confirmed that the O2 formed is cleanly derived from H2O2 (Ref.2). Notes: The rate increases rapidly in the presence of catalysts such as MnO2 and KI (Ref.2). The rate of decomposition is slow at room temperature, but it increases with temperature. It is believed to be due to thermal decomposition of H2O2, which seemingly accelerates the photolysis (Ref.3). References: 1.J. P. Hunt, H. Taube, “The Photochemical Decomposition of Hydrogen Peroxide. Quantum Yields, Tracer and Fractionation Effects,” J. Am. Chem. Soc. 1952, 74(23), 5999–6002 (https://doi.org/10.1021/ja01143a052). 2.A. E. Cahill, H. Taube, “The Use of Heavy Oxygen in the Study of Reactions of Hydrogen Peroxide,” J. Am. Chem. Soc. 1952, 74(9), 2312–2318 (https://doi.org/10.1021/ja01129a042). 3.F. O. Rice, M. L. Kilpatrick, “The Photochemical Decomposition of Hydrogen Peroxide Solutions,” J. Phys. Chem. 1927, 31(10), 1507–1510 (https://doi.org/10.1021/j150280a004). Interestingly, as early as 1934 Haber and Weiss (Ref. 1) proposed that HO2∙ is formed in the decomposition of hydrogen peroxide. The subsequent reaction of the transient superoxide radical anion with hydrogen peroxide has been determined to also form the hydroxyl radical (Ref. 2). The higher pH version of the last reaction is, therefore, best represented as: O2∙−+H2O2⟶2HO∙+OH−+O2 And as H++OH−=H2O, the net product formation is not altered. However, alkaline H2O2 is well known to be less stable than acidic hydrogen peroxide (Ref.3) even in absence of light exposure, which accelerates its decomposition (which can involve radical pathways) liberating oxygen! References: 1.Haber Fritz and Weiss Joseph, 1934, The catalytic decomposition of hydrogen peroxide by iron salts. Proc. R. Soc. Lond. A 147: 332–351 http://doi.org/10.1098/rspa.1934.0221 2.TOSHIHIKO OZAWA, AKIRA HANAKI, Reactions of Superoxide with Water and with Hydrogen Peroxide, Chemical and Pharmaceutical Bulletin, 1981, Volume 29, Issue 4, Pages 926-928. https://doi.org/10.1248/cpb.29.926 3.https://www.researchgate.net/figure/Effect-of-pH-on-the-decomposition-of-hydrogen-peroxide-H-2-O-2-0-800-mg-l_fig1_234110563, from Yazıcı, Ersin & Deveci, Haci. (2010). Factors Affecting Decomposition of Hydrogen Peroxide. https://doi.org/10.13140/RG.2.1.1530.0648.
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@yaron
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Hi guys!its getting kind of boring but again a rainy day.They need sunlight bad,the coming days the sun will shine so we will see what happens. Cheers! Finally we have sunshine!The smallest one,a gg,just will not grow i dont know whats wrong with her and she is already in flower. The rest is doing fine i think. Cheers!
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@PalmaGrow
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No se cómo expresar mi felicidad después de casi 3 años sin poder cultivar consecutivamente he podido cosechar esta belleza gracias a @blacktunaco por la K.O una genética llena de resina con flores compactas. Cometiendo errores desde el principio se pudo obtener una excelente planta corrigiendo todo para así mejorar el aprendizaje continuo. Se dieron 12 días de lavado de raíz y 3 de estos estuvo expuesto a lluvia constante durante los 3 días por tal razón se decidió cosechar para evitar dañar las flores
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Olá amigos, obrigado por seguir meu diário! Siga meu perfil, deixe seu like, comentário ou pergunta, ficarei feliz em ajudar se puder. Mais uma semana em que as meninas gritam por um espaço maior, mas ainda faltam cerca de 3 a 4 semanas para colher meu outro ciclo Gorilla Rainbow do meu crescimento de 0,8x0,8, então elas realmente tendem a esticar mais e talvez mostrar alguns sinais de estresse. Aparentemente as plantas adoraram a nova nutrição, mas seguirei acompanhando atento Siga também meu Instagram @casadasarvoresgrow
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Stretched like crazy! Showing sativa dominance. 1 plant had 2 roots stuck in cup and broke off. Hopefully recovery is fine and I can get to the fun of training soon!
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She was a great girl all the way around. tired new Genetics and was not disappointed. Would grow her again. She smells super sweet and yielded pretty well. Stoked on her 👌🏻
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@Weedman46
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11 days from when I switched to 12/12 ladies got there final lst and lollipoped today I will probably defoliate one more time at day 21 of 12/12 and that's all the training She's getting
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This is the first week of flowering, at the end of last week the plants started to grow white pistils, so this the first of flowering. this week recently started, its ongoing (02/10)
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Aquí dejo imágenes de la segunda semana! He estado un poco liado y se me ha pasado! Mañana actualizaré también la 3ª semana que ya mañana arrancamos la 4ª y no van nada mal!! La bolsa de CO2 THE EXHALE está cumpliendo y en si todos los parámetros del cultivo hasta el momento se están cumpliendo, ya os iré contando!!
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@Weedman46
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Buds are starting to swell I had to back way off the Kool bloom pretty sure I stunted them a little also instead of feeding every other watering I cut the bloom nutes in half and feed every watering plants are responding well
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@MCGA81
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Es ist super heiß Sommer 2024. Nachtphase ist Tags und umgekehrt. Ich benutze eine Klimaanlagen.
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So these girls have gone wild after some lst and one being topped they are just surprising me more and more! The topped one has taking flight to the moon 🚀🚀🚀!! The runt is growing and show her self off as well. The stacking on the topped on is pretty insane much props to fastbuds for these genetics!! Also shout out to growace for the system and it’s been doing it’s job can’t complain about anything major a few little things they can fix which will be said in my final review of the product! Well that’s it for now growmies much love and hope all is blessed
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@Paulolo03
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Day 80, harvested 1 plant, she didn't really look good, the buds are very smelly and dense though. Some trichomes were brown so decided to chop her (the smallest buds only had milky trichomes, even not even milky for some). It wasn't one of the biggest so I hope for bigger yields for the other plants ! Now drying, got 145g after the wet manucure. The rest of the plants are still in the grow box, they're healthier and they'll be ready in few days, I thought I would harvest before but mother nature is the boss.. will keep you guys updated !
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Lights sponsored by gottagrowsometime, thanks bro 🙏 Into flowering we go, tents full. Starting to water till runoff now
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@BigDaddyK
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Lux@20,000 Day 22 - Tuesday 6/11/08 - EC was down added 2ml A+B, ph = ok Day 23 - Wednesday - Added 2ml of A+B , ph ok - had a defoliate , removing the big shade leaves to get more light to the tops.took away all the shit at the bottom. Day 24 - Thursday - Added 3ml of A+B , 100 ml of water , ph ok 👍 Day 25 - Friday - Moved into the IWC Oxypots (19l) - Changed to Bloom Nutrients - EC 1.7 (+1.2) , ph 6.2-6.3 - Did a bit of defoliation - see pics Day 26 - Saturday - Added approx 200ml of water, ph ok , EC ok Day 27 - Sunday - lazy day , didnt have to do anything , now they have big roots its all keeping an eye on the ph Day 28 - Monday - added 2 litres of water + 3ml A+B , did some more defoliation. I hope you guys appreciate all the work and detail in this diary, im sharing the knowledge that has taken my 25 years+ to help all the fellow growers out there, i was not the best 2 years ago, you can see by my diaries how far i have come, if you have any questions , now is the time !!
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**Encontrarás la traducción a español al final de la descripción** If you like this week, please hit a like, it costs you nothing! 👊. Thanks in advance 😉! From/Desde: 16/09/19 || To/Hasta: 22/09/19 From day/Desde día: 56 || To day/Hasta día: 62 -----IMAGES & VIDEOS----- V1 - Compiled all growing timelapses into a complete growing video, hope you like it mates!. V2 - My apologies about the quality of this video buddies, I didn't choose a very good place to record it, and also the GoPro released the manual configured blocked exposure, so there are many color differences among days, as every day upon lights on the GoPro make a new exposure and temp adjustment (The light is 3,000k i don't know why the GoPro read it different daily). V3 - I'm still learning to record some cool videos, as for example @MyrceneDream ones 👊, and many others.... I'm not doing it well at time. -----WEEK SUMMARY----- Hard work times drain my time for the plants and to make content, sorry about that. At last flowering started, as can be shown in the weekly video, the first 3 days after the full switch to 12, she stayed in a frozen state, no much growing or movement at all. Since the 4th day she started to grow at high speed, a bit more than a cm/day. She's really looking awesome, making some bold branches and defining every part of the plant very well. Some weeks ago I told that the smell went too strong at home, but it lowered to normal levels last week, now she's smelling more and more each day again ;). I can say about Alice.K, that I had 0 problems or weird things along the current 9 weeks, she suffered very high temperatures, some insects, and also i'm going hard with nutes, I'm cycling EC reaching 2 sometimes, and she didn't show any excess signs at time, I'm not telling that they're not going to exist on Alice, but not at time, if i see some, i will stop and re-adjust. Also she has responded very well to every prune or cut I've maded to her, and the distribution is perfect, I'm in love with the form she developed. while i was thinking on 4 external main colas with 12 secondary decent Satellites, she's developing 2 awesome central colas, with 4 secondary and very decent sub-colas, and then 10 excellent satellites, and many small ones that i will cut later on (Already cutted many below the SCROG net). -----WATERING CALENDAR----- 18/09/19 (Day 58) - 3,000 ml with Tarantula, Piranha, Rhino Skin, Big Bud, Bud Candy & Bud Ignitor @ (1.1 E.C. | PH 6 | 25.7ºC) 22/09/19 (Day 62) - 4,000 ml with Silica Power, Organic Bloom, PK Booster, Bloom Stimulator, Pro Active, Bud Ignitor, Bud Candy, Bud Factor X & Sensizym @ (2.1 E.C. | PH 6.4 | 25.8ºC) *****ESPAÑOL***** Por favor, si te gusta esta semana dale un like, no te cuesta nada 👊. ¡Gracias por adelantado 😉! -----IMÁGENES Y VÍDEOS V1 - He compilado todos los timelapses de crecimiento en un vídeo de 1 minuto, espero que os guste!. V2 - Debo disculparme por la calidad de este vídeo compañeros, no escogí una buena posición para situar la cámara y esta además perdió el bloqueo de exposición que le pongo, por lo que al realizar un auto-ajuste automático a diario, hay diferencia en la exposición y el color entre los vídeos de cada día. No entiendo por que siendo siempre la misma luz de 3.000 k la cámara la interpreta diferente cada día. V3 - Todavía estoy intentado aprender ha hacer buenos vídeos, como pueden ser los de @MyrceneDream 👊 entre muchos otros por ejemplo... De momento no me salen bien, ya iré mejorando. -----SUMARIO SEMANAL----- Estoy teniendo tanto trabajo que me está dejando muy poco tiempo para las plantas y para realizar contenidos, lo siento. Por fin empezó la floración. Como se puede ver en el vídeo semanal, los 3 primeros días de la floración la planta se mantuvo en un estado vegetativo (sin crecimiento). A partir del cuarto día a empezado a crecer a gran velocidad, de momento más de 1 cm al día. De verdad que se ve maravillosa, está engordando bien las ramas y definiendo su partes muy bien. Hace algunas semanas comenté que ya estaba apestando toda mi casa y aún estaba en crecimiento. El olor fue disminuyendo hasta niveles normales y esta semana de nuevo está volviendo a incrementar su olor día a día. De momento debo remarcar que en 9 semanas de cultivo que van, la Alice.k me ha dado 0 problemas o cosas raras. Ha sufrido de altas temperaturas, algunos insectos y he empezado a ir fuerte con los nutrientes. Estoy ciclando la EC en los riegos, sobrepasando los 2 en algunos casos, de momento no ha mostrado ningún signo de exceso. Con esto no quiero decir que no los vaya a mostrar si sigo así, pero de momento no lo ha hecho, si en algún momento empiezo a ver signos, ya frenaré y reajustaré. También es un planta fuerte y con capacidad de recuperación rápida, eso se puede observar en los vídeos perfectamente. Y lo increíble es la distribución que ha adquirido, mientras yo pensaba en una estructura con 4 colas exteriores principales grandes y 12 satélites centrales pequeños, ella me ha sorprendido formándose con 2 cola centrales enormes (para el tamaño del cultivo), 4 colas exteriores grandes y un montón de satélites de tamaño superior al que esperaba, más adelante cortaré los que se queden más retrasados (de momento he cortado mucho de lo que quedaba por debajo de la red) -----CALENDARIO DE RIEGO----- 18/09/19 (Día 58) - 3.000 ml con Tarantula, Piranha, Rhino Skin, Big Bud, Bud Candy & Bud Ignitor @ (1,1 E.C. | PH 6 | 25,7ºC) 22/09/19 (Día 62) - 4.000 ml con Silica Power, Organic Bloom, PK Booster, Bloom Stimulator, Pro Active, Bud Ignitor, Bud Candy, Bud Factor X & Sensizym @ (2,1 E.C. | PH 6,4 | 25,8ºC)
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This week was full of ups and downs,,smiles and frowns,,,due to some early LST,,I managed to pop a couple branches off,,which is always frustrating but at the same time,,interesting and challenging,,so I will let her do her thing for a week or so,,and then look at how I’m going to shape her,,might be a blessing,,🤞🤞🙏